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基本情報
| 登録情報 | データベース: PDB / ID: 9b9j | ||||||||||||
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| タイトル | Integrin alpha-5 beta-1 in complex with BIIG2 Fab | ||||||||||||
要素 |
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キーワード | SIGNALING PROTEIN / CELL ADHESION / Integrin / Antibody Fab / Inhibitory | ||||||||||||
| 機能・相同性 | 機能・相同性情報integrin alpha8-beta1 complex / myoblast fate specification / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha6-beta1 complex / integrin alpha7-beta1 complex / integrin alpha10-beta1 complex / integrin alpha11-beta1 complex / positive regulation of glutamate uptake involved in transmission of nerve impulse / integrin alpha9-beta1 complex ...integrin alpha8-beta1 complex / myoblast fate specification / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha6-beta1 complex / integrin alpha7-beta1 complex / integrin alpha10-beta1 complex / integrin alpha11-beta1 complex / positive regulation of glutamate uptake involved in transmission of nerve impulse / integrin alpha9-beta1 complex / cardiac cell fate specification / regulation of collagen catabolic process / cell adhesion receptor activity / integrin alpha1-beta1 complex / integrin binding involved in cell-matrix adhesion / integrin alpha4-beta1 complex / collagen binding involved in cell-matrix adhesion / integrin alpha2-beta1 complex / Localization of the PINCH-ILK-PARVIN complex to focal adhesions / cell-cell adhesion mediated by integrin / formation of radial glial scaffolds / Other semaphorin interactions / Formation of the ureteric bud / cerebellar climbing fiber to Purkinje cell synapse / CD40 signaling pathway / calcium-independent cell-matrix adhesion / positive regulation of fibroblast growth factor receptor signaling pathway / reactive gliosis / myelin sheath abaxonal region / integrin alphav-beta1 complex / CHL1 interactions / regulation of synapse pruning / basement membrane organization / cardiac muscle cell myoblast differentiation / RUNX2 regulates genes involved in cell migration / Fibronectin matrix formation / alphav-beta3 integrin-vitronectin complex / MET interacts with TNS proteins / Laminin interactions / Platelet Adhesion to exposed collagen / Developmental Lineage of Mammary Stem Cells / germ cell migration / leukocyte tethering or rolling / vascular endothelial growth factor receptor 2 binding / positive regulation of vascular endothelial growth factor signaling pathway / cell migration involved in sprouting angiogenesis / myoblast fusion / positive regulation of cell-substrate adhesion / axon extension / Elastic fibre formation / cell-substrate junction assembly / cardiac muscle cell differentiation / platelet-derived growth factor receptor binding / myoblast differentiation / mesodermal cell differentiation / Differentiation of Keratinocytes in Interfollicular Epidermis in Mammalian Skin / central nervous system neuron differentiation / positive regulation of vascular endothelial growth factor receptor signaling pathway / cell projection organization / wound healing, spreading of epidermal cells / heterophilic cell-cell adhesion / positive regulation of fibroblast migration / integrin complex / regulation of spontaneous synaptic transmission / negative regulation of Rho protein signal transduction / cell adhesion mediated by integrin / heterotypic cell-cell adhesion / MET activates PTK2 signaling / Molecules associated with elastic fibres / Basigin interactions / epidermal growth factor receptor binding / lamellipodium assembly / negative regulation of vasoconstriction / muscle organ development / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / leukocyte cell-cell adhesion / Syndecan interactions / sarcomere organization / dendrite morphogenesis / positive regulation of neuroblast proliferation / positive regulation of wound healing / negative regulation of neuron differentiation / response to muscle activity / positive regulation of sprouting angiogenesis / cell-substrate adhesion / establishment of mitotic spindle orientation / maintenance of blood-brain barrier / homophilic cell-cell adhesion / endodermal cell differentiation / Developmental Lineage of Mammary Gland Myoepithelial Cells / TGF-beta receptor signaling activates SMADs / cleavage furrow / fibronectin binding / negative regulation of anoikis / neuroblast proliferation / RHOG GTPase cycle / intercalated disc / positive regulation of GTPase activity / RAC2 GTPase cycle / RAC3 GTPase cycle 類似検索 - 分子機能 | ||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() | ||||||||||||
| 手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.6 Å | ||||||||||||
データ登録者 | Nguyen, A. / Azumaya, C.M. / Campbell, M.G. | ||||||||||||
| 資金援助 | 米国, 3件
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引用 | ジャーナル: bioRxiv / 年: 2025タイトル: Shared ligand-blocking mechanism but distinct conformational modulation by α5-targeting antibodies BIIG2 and MINT1526A. 著者: Adam Nguyen / Joel B Heim / Gabriele Cordara / Matthew C Chan / Hedda Johannesen / Cristine Charlesworth / Ming Li / Caleigh M Azumaya / Benjamin Madden / Ute Krengel / Alexander Meves / Melody G Campbell / ![]() 要旨: Integrins are heterodimeric receptors important for cell adhesion and signaling. Integrin α5β1 is a key mediator of angiogenesis and its dysregulation is associated with tumor progression and ...Integrins are heterodimeric receptors important for cell adhesion and signaling. Integrin α5β1 is a key mediator of angiogenesis and its dysregulation is associated with tumor progression and metastasis. Despite numerous efforts, α5β1-targeting therapeutics have been unsuccessful due to poor efficacy and off-target effects. A contributing factor is our limited understanding of how integrin conformation influences interactions with therapeutics. Using cell-based functional assays, patient derived xenografts, biophysics, and electron microscopy, we shed light on these relationships by characterizing two anti-α5β1 antibodies, BIIG2 and MINT1526A. We show that both antibodies bind α5β1 with nanomolar affinity, reduce angiogenesis , and bind overlapping epitopes that block fibronectin binding. However, using cryoEM, we reveal that while BIIG2 binding doesn't alter the conformational states, MINT1526A restricts α5β1's range of flexibility. These insights can guide which aspects to prioritize and improve the design of future integrin-targeted therapeutics. | ||||||||||||
| 履歴 |
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9b9j.cif.gz | 434 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9b9j.ent.gz | 343.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9b9j.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/b9/9b9j ftp://data.pdbj.org/pub/pdb/validation_reports/b9/9b9j | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
| 登録構造単位 | ![]()
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| 1 |
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要素
-タンパク質 , 2種, 2分子 AB
| #1: タンパク質 | 分子量: 108693.734 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Integrin alpha-5 ectodomain with cleaved, HRV 3C cute site, acid coil and Strep-Tag II. 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: ITGA5, FNRA / 細胞株 (発現宿主): ExpiCHO発現宿主: ![]() 参照: UniProt: P08648 |
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| #2: タンパク質 | 分子量: 80653.781 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Integrin beta-1 ectodomain with cleaved HRV 3C cut site, base coil, and 6x His-tag. 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: ITGB1, FNRB, MDF2, MSK12 / 細胞株 (発現宿主): ExpiCHO発現宿主: ![]() 参照: UniProt: P05556 |
-抗体 , 2種, 2分子 HL
| #3: 抗体 | 分子量: 23400.129 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
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| #4: 抗体 | 分子量: 23421.041 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
-糖 , 5種, 11分子 
| #5: 多糖 | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #6: 多糖 | alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D- ...alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #7: 多糖 | #8: 多糖 | alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #10: 糖 | ChemComp-NAG / | |
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-非ポリマー , 1種, 7分子 
| #9: 化合物 | ChemComp-CA / |
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-詳細
| 研究の焦点であるリガンドがあるか | N |
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| Has protein modification | Y |
-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
| 構成要素 | 名称: Protein complex of integrin alpha-5 beta-1 with BIIG2 Fab タイプ: COMPLEX / Entity ID: #1-#4 / 由来: RECOMBINANT | ||||||||||||||||||||
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| 分子量 | 実験値: NO | ||||||||||||||||||||
| 由来(天然) | 生物種: Homo sapiens (ヒト) | ||||||||||||||||||||
| 由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||
| 緩衝液 | pH: 7.4 / 詳細: 20mM Tris-HCL, 150mM NaCl, 5mM CaCl2 | ||||||||||||||||||||
| 緩衝液成分 |
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| 試料 | 濃度: 0.15 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
| 試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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電子顕微鏡撮影
| 顕微鏡 | モデル: TFS GLACIOS |
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| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 36000 X / 最大 デフォーカス(公称値): 1800 nm / 最小 デフォーカス(公称値): 1400 nm / Cs: 2.7 mm |
| 試料ホルダ | 凍結剤: NITROGEN |
| 撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 撮影したグリッド数: 1 / 実像数: 3656 |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
| 粒子像の選択 | 選択した粒子像数: 2425530 | ||||||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 317066 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | B value: 93 / プロトコル: RIGID BODY FIT / 空間: REAL / Target criteria: Cross-correlation coefficient 詳細: Initial local fitting was done using ChimeraX and then Phenix, ISOLDE and COOT for flexible fitting and modeling. | ||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | 3D fitting-ID: 1 / Accession code: 3VI3 / Initial refinement model-ID: 1 / PDB-ID: 3VI3 / Source name: PDB / タイプ: experimental model
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| 拘束条件 |
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コントローラー
万見について




Homo sapiens (ヒト)

米国, 3件
引用




PDBj

















FIELD EMISSION GUN
